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authorJaroslav Kysela <perex@perex.cz>2010-02-16 11:19:18 +0100
committerJaroslav Kysela <perex@perex.cz>2010-02-16 11:19:18 +0100
commitba9341dfef6b0201cd30e3904dcd0a47d3dc35e0 (patch)
treed83637979db83bb9d5a23e190148b90b60c976d2 /sound/usb
parentd39e82db73eb876c60d00f00219d767b3be30307 (diff)
parentf167e1d073278fe231bbdd5d6c24fb9d091aa544 (diff)
downloadlinux-ba9341dfef6b0201cd30e3904dcd0a47d3dc35e0.tar.bz2
Merge branch 'fixes' into devel
Diffstat (limited to 'sound/usb')
-rw-r--r--sound/usb/usbmidi.c18
1 files changed, 15 insertions, 3 deletions
diff --git a/sound/usb/usbmidi.c b/sound/usb/usbmidi.c
index 8f5bc1e8dabc..b2da478a0fae 100644
--- a/sound/usb/usbmidi.c
+++ b/sound/usb/usbmidi.c
@@ -1162,10 +1162,22 @@ static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi* umidi,
pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep);
else
pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep);
- if (umidi->usb_id == USB_ID(0x0a92, 0x1020)) /* ESI M4U */
- ep->max_transfer = 4;
- else
+ switch (umidi->usb_id) {
+ default:
ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1);
+ break;
+ /*
+ * Various chips declare a packet size larger than 4 bytes, but
+ * do not actually work with larger packets:
+ */
+ case USB_ID(0x0a92, 0x1020): /* ESI M4U */
+ case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */
+ case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */
+ case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */
+ case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */
+ ep->max_transfer = 4;
+ break;
+ }
for (i = 0; i < OUTPUT_URBS; ++i) {
buffer = usb_buffer_alloc(umidi->dev,
ep->max_transfer, GFP_KERNEL,